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Port 1571 (rdb-dbs-disp)

IANA assigns port 1571 to rdb-dbs-disp: Oracle Remote Data Base.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rdb-dbs-disp TCP Oracle Remote Data Base mackin -
rdb-dbs-disp UDP Oracle Remote Data Base mackin -

Check what is listening on port 1571

Linux: is anything listening on TCP 1571?
sudo ss -tlnp 'sport = :1571'
Linux: UDP 1571
sudo ss -ulnp 'sport = :1571'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1571
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1571 '
Windows (Command Prompt)
netstat -ano | findstr :1571
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1571 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1571
From Windows
Test-NetConnection HOST -Port 1571
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1571

Block port 1571 in the firewall

ufw
sudo ufw deny 1571/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1571 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1571 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1571' -Direction Inbound -Protocol TCP -LocalPort 1571 -Action Block
ufw
sudo ufw deny 1571/udp
iptables
sudo iptables -A INPUT -p udp --dport 1571 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1571 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1571' -Direction Inbound -Protocol UDP -LocalPort 1571 -Action Block

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All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.